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We have 16 questions about mending 'optimax hot code' in category Heating, Home Heating Systems which have been answered
Big bang on ignition?
OPTIMA 701 Ferrori heating problem?
how can i fix boiler?
optima 701 pressure rises when heatings on drops when off?
how do i depressurise a ferrolli optima boiler?
Trianco Optima Boiler Programmer Fault (QA73)?
Optima failing to fire up?
how can i fix my ferolli optima 701?
high pressure when heatings on?